audio flinger: fix AEC and NS suspend logic

Make sure we suspend/restore AEC and NS only when the suspend condition
actually changes to avoid mismatch in number of suspends/restores
causing the ref counting mechanism to leave the effects in suspend mode
while they should not.

Also clear the suspend state on an effect session before parking it in
the orphan chains list so that it is in default state whne attached to a
new record thread.

Bug: 63015903
Test: verify that switching BT SCO on/off with Duo enables or disables
AEC and NS accordingly

Change-Id: I4d0f0bf818deca3952da3c67bb7e83cb500429c7